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Altera_Forum
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8 years ago

Asynchronous input strobe detection

Hello, We are using Cyclone IV EP4CE40F23I7 and we have an implementation for an interface to a DSP (ADSP-21489, AMI Interface), which is causing us some problems with timing. The fact is that...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

@mfbm,

Shouldn't you have two flip-flops in the new domain to handle the clock crossing? One flip-flop will leave you with problems of metastability. My best guess is that this is your current problem.

Also, for my own reference, how fast is this interface supposed to work? Perhaps another approach would be more appropriate and easier?

Dan